package com.cpp.server.interceptor;



import com.cpp.common.properties.JwtProperties;
import com.cpp.common.utils.JwtUtil;
import com.cpp.pojo.pojo.User;
import com.cpp.server.context.UserHolder;
import com.cpp.common.constant.JwtClaimsConstant;

import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);

            //从令牌中获取当前登录用户信息
            Long id = Long.valueOf(claims.get(JwtClaimsConstant.ID).toString());
            String userId = String.valueOf(claims.get(JwtClaimsConstant.IMAGE_URL).toString());
            String username = String.valueOf(claims.get(JwtClaimsConstant.USERNAME).toString());
//            String password = String.valueOf(claims.get(JwtClaimsConstant.PASSWORD).toString());
            String sex = String.valueOf(claims.get(JwtClaimsConstant.SEX).toString());
            String role = String.valueOf(claims.get(JwtClaimsConstant.ROLE).toString());

            User user = User.builder()
                    .id(id)
                    .username(username)
//                    .password(password)
                    .sex(sex)
                    .imageUrl(userId)
                    .role(role)
                    .build();

            UserHolder.setCurrentUser(user);
            log.info("当前用户：{}", user);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
